17.2×(-5)-7.2×(-5) -3.5×(6分之1-0.5)×7分之3÷(-2分之1)
问题描述:
17.2×(-5)-7.2×(-5) -3.5×(6分之1-0.5)×7分之3÷(-2分之1)
(-27又11分之9)÷9
17.2×(-5)-7.2×(-5)
-3.5×(6分之1-0.5)×7分之3÷(-2分之1)
答
=--306/11 ×1/9
=-34/11
=-5×(17.2-7.2)
=-5×10
=-50
=-7/2×(1/6-1/2)×3/7×(-2)
=7/2×2 ×(-1/3)×3/7
=7×(-1/7)
=-1(-4分之3)×(-1又2分之1)÷(-2又4分之1)=3/4×3/2×(-4/9)=9/8×(-4)/9=-1/2-9÷3分之1×3 计算(-3)×3分之1÷(-3分之1)×3的结果是?A。9 B。-9C。1 D.-1 (-7)×3-24÷2分之1=选A-3 ×1/3×(-3)×3=-1×(-3)×3=9=-21-24×2=-21-48=-69